MS
Mary Sims — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Sims across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1905), then head of a 10-person household.
Age 35
b. ~1905
Female
Spouse
Born: Texas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Sims |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Township / Ward | Chicago |
| Est. Birth Year | ~1905 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Sims | Daughter | — | 7 | ~1933 |
| Edward Sims | Son | — | 17 | ~1923 |
| Annie Sims | Daughter | — | 4 | ~1936 |
| Mary Sims | Spouse | — | 35 | ~1905 |
| William Sims | Head | — | 52 | ~1888 |
| Rufus Sims | Son | — | 6 | ~1934 |
| Airline Sims | Daughter | — | 11 | ~1929 |
| Dorothy Sims | Daughter | — | 12 | ~1928 |
| Howard Sims | Son | — | 9 | ~1931 |
| Daniels Sims | Son | — | 3 | ~1937 |
Census Appearances
1930
Cook, Illinois
Spouse, age 25
Cook, Illinois · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simms |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 15 |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Cook-County, Illinois
Spouse, age 35
Cook-County, Illinois · implied b. ~1905 — 10 household members
| Surname | Sims |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Sims across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Sims
Spouse · 1940 · age 35 · b. ~1905 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00926-00663)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Nathan Lastrappe | 53 | Head | Porter | Louisiana |
| 42 | Lucy Lastrappe | 48 | Wife | — | Georgia |
| 43 | Allen Herbert | 47 | Head | Hauling | Mississippi |
| 44 | Curtis L. R. Adams | 44 | Lodger | Delivery | Mississippi |
| 45 | Elizabeth Adams | 22 | Lodger | — | Mississippi |
| 46 | Elbert Williams | 5 | Lodger | — | Mississippi |
| 47 | Odell Reed | 46 | Head | — | Mississippi |
| 48 | Mary Reed | 40 | Wife | — | Mississippi |
| 49 | Louise Reed | 7 | Daughter | — | Mississippi |
| 50 | Odessa Reed | 4 | Daughter | — | Illinois |
| 51 | Effie Moore | 44 | Head | — | Georgia |
| 52 | Clara Massie | 48 | Lodger | — | Mississippi |
| 53 | Clamond Nelson | 55 | Head | — | Louisiana |
| 54 | Mattie Nelson | 28 | Wife | — | Mississippi |
| 55 | Emanuel Nelson | 8 | Son | — | Illinois |
| 56 | Johnnie Mae Nelson | 6 | Daughter | — | Illinois |
| 57 | Emma Nelson | 5 | Daughter | — | Illinois |
| 58 | Ora Ware | 50 | Lodger | House Work | Alabama |
| 59 | Elie Lewis | 36 | Head | Waiter | Louisiana |
| 60 | Lena Lewis | 36 | Wife | Proprietress Lunch Room | Oklahoma |
| 61 | William Hicks | 64 | Head | Meat Sorter | Alabama |
| 62 | Penny Hicks | 59 | Wife | — | Alabama |
| 63 | George Hicks | 33 | Son | Casing Man | Mississippi |
| 64 | Mattie Hicks | 16 | Daughter | — | Alabama |
| 65 | Perlilion Hurd | 25 | Head | New Worker | North Carolina |
| 66 | Robert Hurd | 8 | Son | — | Illinois |
| 67 | Charles Hurd | 5 | Son | — | Illinois |
| 68 | William Sims | 52 | Head | Used Furniture Dealer | Alabama |
| 69 | Mary Sims THIS PERSON | 35 | Wife | — | Texas |
| 70 | Edward Sims | 17 | Son | Laborer | Illinois |
| 71 | Dorothy Sims | 12 | Daughter | — | Illinois |
| 72 | Airline Sims | 11 | Daughter | — | Illinois |
| 73 | Howard Sims | 9 | Son | — | Illinois |
| 74 | Mary Sims | 7 | Daughter | — | Illinois |
| 75 | Rufus Sims | 6 | Son | — | Illinois |
| 76 | Annie Loulet Sims | 4 | Daughter | — | Illinois |
| 77 | Daniels Sims | 3 | Son | — | Illinois |
| 78 | Jesse Howels | 42 | Head | Laborer | Georgia |
| 79 | Sallie Howels | 35 | Wife | Shading Cloth | Georgia |
| 80 | Nancy Howels | 19 | Daughter | Grader | Georgia |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)